Method of manufacturing double-walled vacuum-receptacles.



O. MOBERG & E. HOOGE.

METHOD OF MANUFACTURING DOUBLE WALLED VACUUM RECEPTACLES. APPLICATION FILED MAR.20.1916.

Patented Sept. 26, 1916.

2 SHEETS-SHEET I.

WITNESSES.-

WM 2; fl m [N V EN TORS Oscar Mobery:

Edward //00 e:

ATTORNEY.

0. MOBERG & E. HOOGE.

METHOD OF MANUFACTURING DOUBLE WALLED VACUUM RECEPTACLES.

' APPLICATION FILED MAR. 20. 1916.

1,199,484. PJILIIIMSUPL 20, 1916.

2 SHEETS-SHEET 2.

WITNESSES: I N V EN TOR5 ATTORNEY.

UNITED STATES PATENT oF ioE.

OSCAR MOBERG AND EDWARD I-IOOGE, OF NEW BRITAIN, CONNECTICUT, ASSIGNORS TO LANDERS, FRARY 8a CLARK, OF BRITAIN, CONNECTICUT, A CORPORATION OF CONNECTICUT.

METHOD OF MANUFACTURING DOUBLE-WALLET) VACUUM-RECEPTACLES.

- Specification of Letters Patent. Patented Sept. 26, 1916.

Original application filed August 12, 1914, Serial No. 856,383. Continuation application filed March 25,

I 1915, Serial No. 16,906. Divided and this application filed March 20, 1916. Serial No. 85,259.

within the outer blank while the bottom of To all whom it may concern Be it known that we, OSCAR MOBERG and EDWARD Hooon, citizens of the United States, and residents of New Britain, in the county of Hartford and State of Con11ect1- out, have invented certain new and useful,

Improvements in the Method of Manufacturing of which the following is a specification.

The invention forming the subject matter of this application, which is a division of application S. No. 856,883, filed August 12, 1914, relates particularly to a new method of performing certain steps in the manufacture of a double-walled vacuum receptacle.

The description of the invention is directed to a receptacle in which the neck ends of the blanks are of reduced diameter, and a particular step in the process of manufacture to which the invention is directed is the closing in, shaping and finishing of the bottom of the outer blank after the inner blank has been assembled within it.

Broadly considered, the invention contemplates the utilization of forces acting both within and without'the outer blank, to assist in closing, shaping and finishing thebottom thereof. As here illustrated, and the preferable mode of operation, is to close, shape and finish the bottom of the outer blank before the lip edges of the blanks are secured together in order that some agency, such as air pressure, may be introduced into the outer blank through the neck to assist in shaping and finishing the bottom. This preferred mode of operation necessitates the su bldiik while the bottom of the outer blank is being operated upon, and the preferred method of so supporting the inner blank is through the utilization of those supports which are located between the blanks near the lower ends thereof to hold the blanks against vibration, which would tend to crack the seal at the lip edges. In other words, the permanent supports between the walls of the vacuum receptacle are here utilized as the means for supporting the inner blank Double-Walled Vacuum-Receptacles,

ort of the inner blank within the outer,

the outer blank is being operatedupon. By so carrying forward such methods of manufacture, the agencies within the outer blank may be also utilized for the formation of a small aperture near the lower end thereof to which the exhausting tube is secured.

I In the drawings there is illustrated apparatus by which the new method of manufacture hereinafter to be described may be carried out to very good advantage.

Flgure 1 is a side-view of the apparatus. Fig. 2 1s a top view thereof. Fig. 3 is a view similar to Fig. 1, but showing the bot-' tom mold. Fig. l'is a detail view showing a step in the operation of closing in the bottom of the outer member when it is of what will be termed the skirted type. Fig. 5 is a detail view showing the use of the mold. Fig. .6 is a detail view showing the use of the localized flame for forming the aperture to which the exhausting tube is secured.

Referring now to the drawings, wherein a suitable apparatus for carrying out this process is illustrated, A denotes the inner blank positioned within the outer blank B and supported bythe supports 2. The neck end of the outer blank is secured in the chuck 5 supported in a bearing 6 and to the shaft of which a driving pulley 7 is secured. The chuck shaft is made hollow and communicates with the interior of the chuck in order that an agency such as pneumatic pressure may be introduced into the interior of the outer blank.

The mode of operation is as follows The blanks being supported in and rotated by the chuck, heat is applied to the 9, 9, until the glass becomes soft enough to be drawn out to roughly close in the bot-1 tom. This leaves the bottle very rough and uneven, but by the application of heat and a slight air pressure within the bottle while it is being rotated, the bottom can be finished with a suitable degree of accuracy both as regards its shape and its spacing from the bottom of the inner blank. In

I tion with the air pressure within the blank finally finishes the bottom of the blank. The mold may of course he slid back out of the way when it is no longer needed. The

bottom of the outer blank now being completed, it is necessary to form a hole in the outer blank and preferably near the bottom, to which the exhausting tube may be attached. This hole is formed by localizing the heat at the proper point, as by the small gas jet 15, and when the glass has been a heated 'to a sufficient extent, the production of a slight air pressure within the blank will break the softened glass away, leaving a small aperture to which one end of a short exhausting tube may be attached. By preference this small-jet 15' is supported by an arm-which is pivoted as at 16, and the jet is normally held out of operative position as by the. spring 17, but in such relation to the blank as it is held in the chuck that when it is pressed toward the blank the jet will play upon the blank at about the right spot.

To complete the mechanical structure of the bottle, the opening left for the admission of air into the outer blank is to be sealed up. By preference, and as shown in the embodiment selected for illustration, this opening is of the full circumference of the necks of the blanks, but so far as finishing the bottom of the outer blank is concerned the degree or extent of the opening is entirely immaterial so long as there is left a passage for air into the outer blank.

That feature of the foregoing process which is of peculiar importance is the utilization of influences operating within the outer blank for the shaping and finishing of its bottom.

Another feature of great importance is the preferred mode of procedure in supporting the inner blank solely from the outer blank, and especially in utilizing the permanent supports for this purpose.

The .practice in the manufacture of double walled vacuum receptacles heretofore has been to unite the lip edges completely before the bottom of the outer blank was closed in, which made it impossible to utilize any agency within the outer blank to assist in shaping and finishing it. The herein described method of manufacture it will be observed is readily distinguishable from the prior practice in respect to the matters heretofore specified.

We desire it to be understood. that it is the invention.

We claim as our invention 1. That improvement in the art of manufacturing double-walled vacuum receptacles of glass or other vitreousmaterials in which the neck end is of reduced diameter which consists in assembling together two blanks;

supporting the inner blanlbfrom and in spaced relation with respect to the outer blank; closing in the bottom of-the outer blank, and subjecting it both interiorly and exteriorly to shaping and finishing agencies.

2. That improvement in the art of manufacturing double-walled vacuum insulated receptacles, in which the neck ends of the blanks are of reduced diameter, which consists in assembling an inner blank closed at its bottom within an outer blank open at both ends; next in closing the bottom of the outer blank; and then, in 'shaping and finishing the bottom of the outer blank in the presence of air pressure acting within said blank.

3. That improvement in the art of manufacturing double-walled vacuum insulated receptacles, in which the neck ends of the blanks are of reduced diameter, which consists in assembling an inner blank closed at its bottom within an outer blank, open at both ends; next, in closing the bottom of the outer blank; and then, in rotating said blank and shaping and finishing the bottom thereof while rotating, in the presence of air pressure acting Within said blank.

4. That improvement in the art of manufacturing double-walled vacuum insulated blanks are of reduced diameter, which consists in assembling an inner blank closed at its bottom within an outer blank open at both ends; next, in closing the bottom of the outer blank; and then, in shaping and finishing the bottom of the outer blank in a mold in the presence of air pressure acting Withinsaid blank.

5. That improvement in the art of manufacturing double-walled vacuum insulated receptacles, inwhich the neck ends'of the blanks are of reduced diameter, which consists in assembling an inner blank closed at its bottom within an outer blank open at both ends; next, in closing the bottom of the outer blank; and then, in rotating said blank and shaping and finishing the bottom thereof in a mold while rotating, in the presence of air pressure acting within said blank.

6. That improvement in the art of shaping the bottom of the outer member of a double-walled vacuum receptacle having a reduced neck end, which consists in heating receptacles, in which the neck ends of the x ing the bottom of the outer blank before the and rotating it, and simultaneously subjecting it interiorly to the pressure of air while the inner member is supported therein.

facturing double walled vacuum receptacles of glass and other vitreous materials, and having contracted necks which consists in assembling together two blanks, the outer one being open at both ends and the inner one closed at one end; holding said inner blank in proper spaced relation with respect to the outer blank; closing and -shaplip edges of the blanks are united; and subjecting the interior of the outer blank to pressure while its bottom is being shaped and finished. I v

9. That improvement in the art of manufacturing double walled vacuum receptacles of glass or other vitreous materials and hav-.'

ing contracted necks, which consists in assembling together two blanks, the outer one being open at both ends and the inner one' closed at one end; holding said inner blank in proper spaced relation with respect to the outer blank, and closing and shaping the bottom of the outer blank before the lip edges. of the two blanks are completely united.

10. That improvement in the art of manufacturing double walled vacuum receptacles made of glass or other vitreous material and I having contracted necks. which consists first in assembling one blank within the other; sec0nd,in closing, shaping and finishing the bottom of the outer blank; and finally, in joining together the neck ends of the two blanks. v

11. That improvement in theart of manufacturing double walled receptacles made of glass or other vitreous material, where the neck ends of the blanks are of reduced diameter relative to the body, which consists in supporting and rotating the open-ended outer blank, supporting the inner blank within the outer blank but not attached thereto; closing in, shaping and finishing the bottom of the outer blank; and finally,

sealing together the neck ends of said blanks.

12. That improvement in the art of manufacturing double walled vacuum receptacles made of glass or other vitreous material and having contracted necks, which consists in assembling an inner blank closed at its bot:

tom within an outer blank open atboth ends, rotarily supporting said outer blank, closing in, shaping and finishing the bottom thereof,

and introducing pneumatic pressure within said outer blank while it is rotating, to assist in shaping the bottom of it.

13. That improvement in the art of manufacturing double-walled vacuum receptacles made of glass or other vitreous material and having contracted necks, which consistsoin I assembling an inner blank closed at itshottom within an outer blank open at both ends,

said outer blank through the neck thereof to assist in shaping the bottom of it.

. rotarily'supporting said outer blank, closing m, shaping and finishing the bottom thereof, and lntrodu'cing' pneumatic pressure within soil 14. That improvement in the art of manufact-uring. double-walled vacuum insulated receptacles and having contracted necks, which consists in assembling together. the

two blanks, one within the other with their lips adjacent but unconnected, the inner -blank being closed at its bottom and the outer blank open; inserting permanent supports between the blanks to hold the inner one and properly space it relative to the ing the bottom of the outer blank before the r lips of the two blanks are united.

15, That improvement in the art of manufacturing double-walled vacuum receptacles of glass or other vitreous materials and having contracted necks, which consists in utilizing the permanent supports between the walls of the two assembled blanks as the sole means for holding said blanks in' proper relative position during manufacture, and closing and finishing the bottom of the outer blank before the two blanks are joined together at their lip edges. 16. That improvement in the art of manufacturing double-walled vacuum receptacles of glass and other vitreous materials and having contracted necks, which consists in assemblingtogether two blanks, the outer of which is open at both ends and the inner closed at the bottom; closing in the bottom of the outer blank, and simultaneously subjecting it both inside and outside to the action of shaping and finishing agencies; permanent supports being located between said blanks near the bottom and forming the sole supporting means for the inner blank dur ing the closing and finishing of the bottom of the outer blank.

17. That improvement in the art of manufacturing double-walled vacuum receptacles of glass and other vitreous materials, which responding end of the inner blank being closed; inserting permanent supports between said blanks which constitute the sole supporting means of one of the blanks from and by the other; next, closing in, shaping and finishing the bottom of the outer blank in the absence of extraneous supports for the inner blank; and finally, sealing together the lip edges of said blanks.

18. That improvement in the art of manufacturing double Walled vacuum insulated receptacles and having contracted necks,

which consists in locally heating the outer blank near the bottom after it has been closed, shaped and finished, and subjecting the interior of the said blank to air pressure introduced through the neck of the outer blank, to form an opening through said blankvat the heated spot. a

OSCAR MOBERG. EDWARD HOOGE. 

